⌘K

Contents

Network Analysis

Circuit Elements

Circuit Elements Review Independent Sources Dependent Sources Source Transformation Dot Convention Star-Delta Transformation

Network Theorems

Kirchhoff's Laws Mesh Analysis Nodal Analysis Superposition Theorem Thevenin's Theorem Norton's Theorem Maximum Power Transfer Reciprocity Theorem Millman's Theorem Tellegen's Theorem Compensation Theorem

Transient Analysis

Transient Behavior First Order RC Circuits First Order RL Circuits Second Order RLC Series RLC Parallel Response Laplace for Transients Initial Conditions

Sinusoidal Steady State

Phasors Impedance and Admittance AC Power Analysis Complex Power Power Factor Correction Three Phase Systems Power Measurement 2-Wattmeter Unbalanced 3-Phase

Resonance

Series Resonance Parallel Resonance Q Factor and Bandwidth Locus Diagrams

Two-Port Networks

Z Parameters Y Parameters h Parameters ABCD Parameters g Parameters Parameter Conversions Interconnection of Two-Ports T and Pi Networks

Network Synthesis

Network Synthesis Intro Positive Real Functions LC Network Synthesis RC Network Synthesis RL Network Synthesis Foster Forms Cauer Forms Properties of LC/RC/RL Immitance

Other Topics

Graph Theory Cut Set and Tie Set Duality SPICE Basics Filter Fundamentals Constant-k Filters m-derived Filters

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP Electronic Devices

Section Progress43%

3 of 7 articles

First Order RL Circuits

Time constant, current rise and fall.

Updated: 19 March 2026

4 min read

RL Circuit Analysis

Sharpen your analysis of current transients and time constants in first-order RL circuits.

Question 1 of 3

Q1.A series RL circuit has R = 50 ohm and L = 500 mH. A DC voltage of 100 V is applied at t = 0 with zero initial current. What is the steady-state current and the time constant?

Related Articles

Laplace for Transients

Solving circuit differential equations using s-domain.

12 min read

First Order System Response

Time constant tau, rise time, settling time.

4 min read

Transient Behavior

Forced response, natural response, time constants.

7 min read

RLC Parallel Response

Natural response, resonant frequency.

12 min read

RL Network Synthesis

Synthesis of RL driving point impedances.

11 min read

First Order RC Circuits

Second Order RLC Series